Method of and apparatus for forming thin sheets of a plastic and yielding coimpound



(NModeL) 4 J. B. EDS METHODOE AND APPAR US FOR THIN SHEBTS OPA PLASTIG YIELD GOMP OUND. Patented Aug. 14, 1883.

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JARVIS 13; nnson, or ADAMS, MAss oHUs TTs.

METHOD OF AND APPRATUS FOR FORMING THIN SHEETS OF A PLASTIC AND Y|ELDlNG COMPOUND.

. SPECIFICATION formingpart 'of Letters Patent No. 283,224, dated August 14, 1,883.

` Application filed Afiruaa, ssa (NonodeL) Be it known that I, Jnmus B. EDsoN, of the town of Adams, in the county of Berkshire and State of Massachusetts, have invented new and useful Improyements in the Method of and Apparatus for Forming Thin Sheets of a Plastic and Yielding compound-such as zylonite or similar substances chiefiy formed of pyroxyline-of which the followin g is a specification. t i i i i This invention pertains to that class of fabrics` in which there is the operation' of shaving or slicing the substances which are to be formed into sheets, as in the manufacture of Veneer; and the invention consists in this case in mounting the composition upon a foundaticn, as a mandrel or bed, and holding it in such a manner that as it traverses to and fro continuously, as the case may be, according to the length and breadth of the bed or,` support thereof, its surface will be held under compression by a device placed immediately in front of the cutting or separating edge, so that a continuous pressure will be maintained upon the said elastic material equal to the resistance of the cutting-edge.

In illustrating this invention `I may here remark that the corresponding principle is used .in cutting veneers fromwood, or in the planing-machines in which pressure is brought to bear in front of the cutter; but there "is this 4 marked and disting'uishing difference, that the pressure in front of the cutting-knife in the 'formation of thin sheets of plastic material re-` quires to be adapted to'the 'amount of pressure due to the cutting-edge, and therefore is an element that is notrequired in the pressure-bar or the pressure-surface in the formationof Veneers, or in the well-known operamandrel around which thezylonite sforned and the relationship of the knife' or cutting- 'edge toits surface, and also the pressure-bar upon the surface required to be cut.

to operate in the same manne: as' shown in Fig. 1. i i

At A is represented abed or platen for supporting the material, whether it be a flat bed or a shaft, as represented at A' in Fig. 2, and upon either of these the material is mounted in any of the well-known ways of fastening such substances upon either beds or aXes.

The knife B is mounted in suitable guides, as at C, to support and guide it toward the surface 'of the material fastened either upon 1 the bed or axes, and in either case must be moved forward toward the material by suitable fecding meclanism, such as is well known in the arts for the operation of such devices, either in planers or lathes.

At D is represented a pressure-bar, which maybe a round-faced narrow surface, as shown in the drawings; or it may be a roller under i certain circumstances, supported in suitable guides, as at E, and held in position by springs or weights, as at F, so that any required resistance or pressure may be brought to bear is preferably rounded on its bearing-surface,

Thisbar so that it compresses the elastic or yielding fabric immediately in front of the cutting-edge to the exact required degree necessary for holding it against the cutting-edge in proportion to the amount of resistancc necessary for the different thicknesses of the sheet required to be produced-that is, the resistance of the preisure-bar shall be exactly equal to the den- 'sity of the material necessary for cutting the degree of thickness or thinness of sheets-and* 2. In a machine fol' the fo'mato'i of sheets scrbed my name and afixed 'myseal in the from a plastc and yeldng substanee, such as presence of two subscribng witnesses. zylonte or its equivalent, the eombinaton of a pressure-bar orts equivalent With' the bed JARVIS B. EDSON. [L s.] 5 01: support of the material, and immediately :iu front of the cuttng-edge or knife, as here- I fitnessesz before set forth. EUGENE N. ELIOT,

In witness whereof I have hereunto sub- HARRY EDWARISSL 

